A field is not found because it is not in the search area
Check that the search area includes the field. The search area for each field is set in Eiglobalextra.ini using the TitleSearchRectxxx and ValueSearchRectxxx settings.
Change the search area for the field using TitleSearchRectxxx and ValueSearchRectxxx in Eiglobalextra.ini.
See INI file help for more information.